Richard Mahaffey on sun 4 dec 05
Hank,
The reason the Oribe went red in the overlap is because the straight
Oribe Green has too much copper to go red.
I susupect that you know this already.
Back in 1993 Mrs. Miki (former first lady of Japan) brought three
potters from Tokyo Geidai (Tokyo National University of Fine Arts and
Music) and they did a presentation on Oribe. They brought dry clear
and oribe green glazes to use and we mixed the formulas with American
materials. The pieces were fired in Oxidation and after they were done
they were soaked in Acid. There was more metal in the Green than could
be brought into the glass, so it fromed a metalic "scum" that was
visible as a rainbow when viewed at an angle. The Acid removed the
copper on the surface making the ware safe to use.
We later tried both the Japanese and American versions in Reduction
kilns and it turned out green with a semi matt texture. After checking
arond (Asking the prof with a Ph.D in Chemistry) we discovered that
there is a limit to how much copper can be used to make reds.
It think of it like the way a Celadon turns brown black if there is too
much iron in the glaze.
Anyway, I have never seen an oribe with red in it in a museum. Could it
be that those were considered flawed and broken at the kiln site?
Best regards,
Rick
Hank Murrow on mon 5 dec 05
On Dec 4, 2005, at 10:37 PM, Richard Mahaffey wrote:
> Hank,
> The reason the Oribe went red in the overlap is because the straight
> Oribe Green has too much copper to go red.
> I suspect that you know this already. I have never seen an oribe with
> red in it in a museum. Could it be that those were considered flawed
> and broken at the kiln site?
Yes, I recognized it quickly when I saw it. I had a meeting with the
curator of the Pottery collection there, and she kindly took it out of
the case for me to confirm by examination in my hands. M.Guimet had an
impeccable eye for quality ceramics, as evidenced by the other things
he colleccted, so he at least found the Mino piece first rate. Me too!
I took the time to sketch it carefully in my journal.
I also had the opportunity to examine a set of nesting boxes by Kenzan
and a Chinese goblet. This had a sort of 'straw' that was luted onto
the outside of the cup part which terminated at the bottom on the
inside, and standing above the hole was a chicken looking up at the
drinker. I assumed that the cup was used for some fermented beer and
the chicken was the warning to stop sucking before getting the lees
down your gullet. Loved that chicken!
Cheers, Hank
www.murrow.biz/hank
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